We decided to put the Mega Man 2 "Dr. Wily Stage 1" song up top to celebrate Rock Man's 20th anniversary, and well, because it's our favorite. If you don't look after the break to check out the equally awesome Final Fantasy IV, Kirby, Mario, and other tunes, though, you officially fail at the internet.
Final Fantasy IV medley
Tetris, Dr. Mario, Gradius, and more
Super Mario Bros. medley